Fire-fighting boat



July 17, 1928. f 1,677,769

Y H. Y. HADEN FIRE FIGHTING BOAT Filed 'Ag-:ril 7, 1927 n. Q NQ, RMN Q1 xm S1) \N\ N N N N N o n A uw o W: *M X u w w mk .I e l fg v\ N c.

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NVENTOR Y-JHadew *www ATTORNEY Patented July 17,1928.'- i d l y 'l 5 1,677,769A

UNITED siai'iis PATE-NT orifice.

mar ir.A Hanni,- or Naw roux, ai. Y.

M present invention relates more particabove method, it willbefound'that in eneral ular y to the motive power and pumping the great pressures, high velocity an small systems of boats of the above Vty/pe, and more volume of the jets'require'd for fire fightparticularly to special adaptation of motive ing are not suitable for ecient propulsion 6 power to the propelling system. In boats ofthe boat in accordance with the rmciples 00 of the above type, it is common to use the employed by Paxton. vIn boats o the sizes Ysaine motor means, either steam engine, or and draft commonly emplo ed for fire fightpreferably a -Diesel internal combustion ing, fitting the bow' jets gir the shape and engine, both for operating `thepumps to iight design speed of the hull will, in neral, re-

I' 10 the fire and Vfor driving the propeller to quire much lower pressures and ar er vol- 65 move the boat from place to place. It is also urnes of water than required for lire ghting. common to use the steam turbine and elec- In this situation, my invention contemtric drive propelling `system in which the plates the employment of two or more pumps generators for suppl g the propelling adapted to operate efficiently at the normal l motors are driven by t e same turbines that full. speed of vthe engine, each pump 'l0 supply the fire pumps as' in the patent to adapted. to deliver water at the lower pres- Babcock No.l 924,128, granted .lune 8 1909. sure required for the-'jet propulsion,- the fire The use of the motor in connection with two fighting pressures being attainedv by connectdifferent setsof mechanism for two different ing two or vmore ofsaid pumps in series.

A purposes involves com lications which it is yFor instance, theengine ma 'be a Diesel in v'(15.

tli'evpumps beingfcontinuously operate the object of my present inventionpto avoid. ternal combustion engine, o the motor cyl- For instance, in the Babcock apparatus above inder type, 'giving' say 600 horsepower at -specified, the propelling generators and normal operatingxspeedofOO revolutionsmotors are. very expensive, the screw propelper minute. Such an Aengin may be' con- 1ers are always in danger of breakage from nected to drive, say, 4 eentifugal p umps 80 debris'found adjacent a fire end, as stated through an intermediate eaiing designedinthe patent, the iire fighting pumps have to step up the rotation to t e desired higher to be put out of commission andv drained speed required for eiiicient operation of said whenever full propelling speed is required. pumps. Each of these pumps-may have a' V ,s0-As will be seen -fromthe.followingdescripcapacity of, say, 2500 gallons per minute 85 tion, my invention involves the discovery against 75 poundsback pressure. Normally, that where rotary pumps are used, two or all the pumps are'operated'in arallelto supmore in series, to supply 'all' ofthe fire plya distributin main supp ying the bow fighting nozzles, aconnection voi the same j ets and .prefera lyalso laterally directed pumpsin parallel will give the proper v Olmanuvring ]ets. The same main-is oon-0o- .fume and velocity for proiirlsion by means nec'ted to the fire iightin nozzles on the deck, of submerged rearwardly. ected bow ets, 'lormally1 for; Prop@ ng pu 4 such' n at pumpsl operating in parallel wil deliver 10,'-3

v a `designedl normal power output. "000 gallons per minute atf pounds pres- `40 My present invention contemplates utilizjfsure.- This is a suitableyolume andpiessure als 'lp sion of the'boat being by water jets used For fire fi hting,

.usure in the @for through 'the Pumps, 'thepro-g for propulsion..- however, two umps may in accordancewith the princi lesset forth l'be connecte in series, the .re t being an .in patents and ap lications o Clifford M.- output of approximately 5000 gallons per V.Paxton,; articular y United States Patent vminute against -150 pounds pressure. 10o Y N0- 1,54 ,026, granted JUDO 30,- 1925@ Afl- 'The advantageV of this schemeisthat the cording to this method, the propulsion 1s by pumps may be installed with permanent semeans of sheet .jets from nozzles located on ries parallel connections, controlled by valves the `bow in advance of and discharging which may be electrically operated from the. *il

59 through the region of the under-water. body centralstationto instantly cha/ from re 105 of the ship, benel th wherethemaiiimum ghtiiig pressure to propulsion pressure, y bow wave.. tends to pile up, when the Ship isy similar valves' the propulsion or manoauat Speed. Y While it iS the0retivring systembeing similarly controlled. cally possible to use the fire ghtingpres- The above and-other featuresof my-inor propulsion in accordance with the vention will be more fol- 11M()A vextending main, 7, oppositely directed ,10

lowing description in connection with the accompanying drawings, in which:

Fig. 1 is a diagrammatic plan view of a power pumping outfit and distributing system for 'et ropulsion and manuvring as well as or re fighting;

Fig. 2 is a side elevation of a fire boat, the side of the boat being broken away to show the essential parts of the equipment along the dotted line 2 2, Fig. 1.

In these drawings, the hull 1 is equipped with a motor 2 which, as above stated, may be a multi-cylinder Diesel oil engine operating through the usual multiplying gear diagrammatically indicated at 3 to drive two parallel shafts, 4, 4, each equipped with two centrifugal pumps 5, 5a and 5b, 5. The intakes of these pumps are supplied through scoops 6, 6", which are deeply submerged, and they deliver to a-fore and aft distributin mam 7, extending forward tothe prope ling nozzles 8, 8 at the bow. Rearwardly, the main is preferably divided into parallel conduits 7, 7b,funitin in a rearward extension, 7. The forwar main may be connected, as in the Paxton system, for supplying forward diagonally directed manuvring nozzles, 9, 9 and the rearwardly with symmetrically and manuvring vnozzles 10,

'Ihe fire nozzles with the usual control means, are mounted on the deckA in con- Athe `intake venient locations, as 11, 11, etc.,

supplied through vertical pipes supplied directly from the main, in the resent case two from each ofthe parallel plpes 7, 7", and three from the rear extension 7c.

It will be lunderstood that al1 parts ofv the above described distributing system are controlled by suitabl located valves, preferably power operate as for instance, valve 12 for the bow jets, 13, 13 for the forward manuvring nozzles and 14, 14 for the aft manuvring nozzles, The engine 2 and' multiplying gear 3 lneed not be further described other than to say that the multiply# mggear is a d ouble'hglical gear, driving two pmlons, and 1s of construction welll known in the art for stepping up the speed of a slow speed engine, to suit the re uirements of a centrifugal pump. Simi arly, the ppcmps need not be articularly described,

anse they are wel known.

' The novel'A requirements of my present inventlon, however, are that the um s be desi ed to operate eiiiciently at spee gil-l of the engine and that at such speed each pump will operate to deliver the maximum amount of water at the relatively low pressure desired for propulsion. Then for series operation to deliver less water at higher pressure, l provide a cross-connecting pipe 20 from the output of pump 5,* to of pump 5 and pipe 20* from p for the fire iig nozzles, said pumps maxlmum4 output at pressures suitable for In operation, valves 21, 21a of the series connecting pipes 20, 20 being closed and valves 22, 22, 23, 23, .being open, the four pumps will operate in parallel, each 1ndependently, to supply its 2500 gallons per mmute against pounds pressure; or Lthe valves 21, 21n being'opened and the other four valves closed, pumps 5L and 5 will opcrate in series Aand pumps 5, 5cl will operate in series, each pair of pumps thus operating in parallel to supply 2500 gallons per pair against 150 pounds pressure.

As'these valves are operated in sets, cerf tain ones opening when others close, it 1s evident they may be. interdependently operated by mechanically or electrically interlockin control systems well known in the art. ne `obvious interdependence is to make valves`22, 22 as three-Way valves, thereby dispensing with valves 21, 21, vrespectively. It my be noted that for efficient operation, these pumps must run atlngh Speed, say 17 00 revolutions perpminute, which is a desirable .speed for an electric generator G, that may be coupled directly to the end ofpump shaft 4, to supply the electrical system of the boat.

L I am aware that many jet propulsion schemes for boats have been proposed and that pumps used for such purpose may be used without any change in speed or output, to ump bilge water from the hold in case ofv disaster or bad leaks or to flood the hold in case of lire but in none of these prior devices has there been any provision or even consideration of the deslrability of, or the means for pumping the water'at previously predetermined volumes and velocity required vfor eflicient jet propulsion, much less in des ign of `the boat and its propulsion means so that the same pumps operated at constant load are exactly right for the jet propulsion when pumpin in parallel and exactly right ting when pumping in series. I claimt: 1. A fire boat, including tire extinguishing nozzles Aand jet propulsion nozzles in combination with an engine, centrifuga pum s and a distributing system for su p ing th kinds lof nozzles, said engine ing of the heavy duty slowspeed type, operatingv through a multiplying gear to drive wo or'morecentrifugalpumps at .normal full speed lfor sup mg each designed for lie 'both kinds Aor the jet propulsion and equipped for connection of two or more pum s in series to furnish higher pressures for re fighting.

2. A fire boat, including fire extingu1shdrive two shafts on each of which shafts at least two of the pumps are mounted, pumps on the same shaftbeng connected and valved for either parallel or series operation.

3. A fire boat, including fire extinguishing nozzles and jet propulsion nozzles in comblnation -with an engine, centrifugal pumps and a distributing system for supplying both 'kinds of nozzles, said pumps being each designed for maximum output at pressures suitable for the jet propulsion and equippedv for connection ofl two ormore pumps -in series to furnish higher pressures for fire fighting.

4. A fire boat, including fire extinguishing nozzles and jet propulsion nozzles in combination with an engine, centrifugal pumps and a distributing system for supplying all of'said nozzles.-

5. fire boat, having an electrical system, a fire fighting system including exterior fire .extinguishing nozzles and jet propulsion nozzles 1n combination with an engine, centrifugal 'pumps and a distributing system for supplying both kinds of nozz es, said engine being of the heavy duty slow speed type, operatingthrough a multi lying gear to drive at least two centrifuga pumps at normal full speed and connected for parallel operation to suppl said propulsion nozzles at the required volume and velocityand in series to supply said lire exinguishing nozzles at correspondingly higher pressure and less volume, and an electric Generator for said electric system desi ned or efficient operation at lthe normal ll s ed. ofsaid ptumps and directly driven by t e pump sha 6. A fire boat equipped with a set of exterior nozzles designed according to fire engine principles to discharge streams of high velocity, long range and large volume to fight distant fires, and a set of bow ,jet nozzles designed to discharge streams of such surface area as to lit the hull at designed fullspeed when sup lied at pressure approximate y one-half or ess than that required for the fire nozzles, in combination witha single system for supplying both sets of nozzles each at their designed pressures, said means including at least two centrifugal pumps and means for drivinl them at approximately the samenormal ull s ed, sald pumps being designed for paralle connection and when so connected, to supply said prcpulsion nozzles at thezrequired volume an velocity, or in series, -to supply said fire nozzles at correspondingly higher velocity and less volume. fSi ned at New York cityin the county o 5th day of April, A. D. 1927.

v i HARRY Y. HADEN.

ew York and State of-New York this 

